I don't know anything about these particular Celtic types but if you search the seller "gomolava1997" on google you'll find him listed on a fakeseller list: http://www.lateromanbronzecoinforum.com/index.php?topic=1218.0
If I thought it were, I would have used buy-it-now to buy it out from under you. It would be worth more than $19 + $15 shipping. He has photos with his username on them. That is usually a good sign, because it is proof that the coin came from that seller. Nervertheless, I doubt his excellent Probus (Have you ever seen one with flan cracks like that?) and I doubt his super Claudius as.
He sells a ton of fakes. Many new collectors have inadvertently bought his fakes because they think "How can you go wrong" with a seller with so much positive feedback.
Thank you guys! I am trying to get more into ancient coins, I've never done much with them and I am very happy to learn more.